Which of the following anatomical structures is directly involved in the production of hormones?
A. Pituitary ,Pancreas
B. Penis,Pons
C. Pancreas ,Penis
D. Prostate, Pancreas
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The pituitary and the pancreas are both structures of the endocrine system that produce hormones involved in body regulation, growth reaand development, sexual functioning, and other processes. The penis Is a structure of the reproductive system that responds to hormones, but it does not produce them. The prostate plays a role in converting testosterone (produced in the testicles) into dihydrotestosterone, but does not actively produce hormones. The pons is located in the brain stem and relays nerve signals that coordinate messages between the brain and the body. The pericardium is a structural component of the cardiovascular system.
Therefore, the Correct Answer is A.
More Questions on TEAS 7 Science Practice Test 1
Question 1:
Which of the below is the best definition for the term circulation?
A. The transport of oxygen and other nutrients to the tissues via the cardiovascular system
B. The force exerted by blood against a unit area of the blood vessel walls
C. The branching air passageways inside the lungs
D. The process of breathing in
The Correct Answer is A.Circulation is transporting oxygen and other nutrients to the tissues via the cardiovascular system. Choice B refers to blood pressure. Bronchi are the branching airways inside the lungs, while inhalation refers to the process of breathing in.
Question 2:
Which of the heart chambers is the largest?
A. Left atrium
B. Right atrium
C. Left ventricle
D. Right ventricle
The Correct Answer is C.Of the four heart chambers, the left ventricle is the largest. When it contracts, it pushes blood out to the organs and extremities of the body. The right ventricle pushes blood into the lungs. The atria, on the other hand, receive blood from the outlying parts of the body and transport it into the ventricles.
The basic process works as follows: Oxygen-poor blood fills the right atrium and is pumped into the right ventricle. from which it is pumped into the pulmonary artery and on to the lungs. In the lungs, this blood is oxygenated. The blood then reenters the heart at the left atrium, which, when full, pumps into the left ventricle. When the left ventricle is full, blood is pushed into the aorta and on to the organs and extremities of the body.
Question 3:
Which of the following is a carbohydrate?
A. Cellulose
B. Hemoglobin
C. Estrogen
D. ATP
The Correct Answer is A.Cellulose is a complex carbohydrate that composes the better part of the cell wall.
Hemoglobin is a protein and is found in red blood cells. Adenosine triphosphate (ATP) is a compound used by living organisms to store and use energy. Estrogen is a steroid hormone that stimulates the development of female sex characteristics.
Question 4:
Every child in a certain family has been diagnosed with autism spectrum disorder (ASD). Based on this evidence, what possible conclusion can be drawn about ASD?
A. ASD may be lethal.
B. ASD may be genetic.
C. ASD is related to traditional nuclear family structures,
D. No conclusion can be drawn based on this evidence.
The Correct Answer is B.The evidence says that every child in a certain family has been diagnosed with autism spectrum disorder (ASD). All of these children have genetic commonalities. Therefore, ASD may be genetic.
The evidence does not mention whether the children died from ASD. Therefore, no conclusion can be drawn that ASD may be lethal. Furthermore, the sample size of the evidence is much too small to suggest that ASD is related to traditional nuclear family structures.
Question 5:
Homeostasis is defined as:
A. Ability of human beings to keep body weight within normal limits
B. Maintenance of a constant external temperature inside a room
C. Ingestion of enough food to keep hunger pains from developing
D. Tendency of the body to maintain a stable environment
The Correct Answer is D.Homeostatic mechanisms are involuntary actions by organs, glands, tissues and cells to maintain balance within the body. If a function is disrupted the body will readjust in an attempt to maintain balance. During periods of starvation the body will break down glucose reserves in order to maintain normal glucose levels.
Question 6:
What type of mutation is represented by the following sequence?
Original: 123456
Mutated: 154326
A. Breakage
B. Deletion
C. Insertion
D. Inversion
The Correct Answer is D.An inversion mutation is represented in the sequence 1 5 4 3 2 6. An inversion error is a type of mutation where an entire sequence of DNA is reversed. In this case, 2 3 4 5 has been reversed to 5 4 3 2.
Breakage, choice A, in a gene can mess up its function entirely or lead to a translocation of genetic information. Choice B, deletion, is when a section of DNA is omitted or lost.
Choice C, Insertion, is when an extra base pair is added to a DNA sequence. Deletions and insertions can lead to a frameshift effect where entire sequences are thrown off because one nucleotide is wrong.
This could result in coding for the wrong amino acid and non-functioning proteins.
Question 7:
Where is the gastrocnemius vein in relation to the femoral vein?
A. Lateral
B. Distal
C. Superior
D. Ventral
The Correct Answer is B.The gastrocnemius vein is found in the calf. The femoral vein is found in the proximal anterior thighs/pelvis.
Since the gastrocnemius vein is found below the femoral vein it is distal or inferior to the femoral vessel.
Question 8:
Identify the location where neurotransmitters are stored immediately prior to use.
A. Area A
B. Area B
C. Area C
D. Area D
The Correct Answer is B.Area B is a synaptic vesicle where the neurotransmitters are stored just before use.
Question 9:
Which of the following are formed when the plasma membrane surrounds a particle outside of the cell?
A. Golgi bodies
B. Rough endoplasmic reticulum
C. Secretory vesicles
D. Endocytic vesicles
The Correct Answer is D.Endocytosis is a process by which cells absorb larger molecules or even tiny organisms, such as bacteria, that would not be able to pass through the plasma membrane. Endocytic vesicles containing molecules from the extracellular environment often undergo further processing once they enter the cell.
Question 10:
When animals eat, insulin is released from the pancreas, stimulating glucose uptake by the liver. When glucose levels drop, the pancreas reduces insulin release. This is an example of which mechanism for maintaining homeostasis?
A. Negative feedback
B. Positive feedback
C. Stress response
D. Parasympathetic regulation
The Correct Answer is A.Maintaining homeostasis means that conditions are kept stable and relatively constant. Negative feedback is a mechanism used to reverse or minimize changes in a system. In this example, negative feedback is used to keep the body's glucose and insulin levels stable. Positive feedback (B) is a mechanism that Increases changes in a system. A stress response (C) describes the body's reaction to threats or pressures. Parasympathetic regulation (D) refers to activities of the nervous system, including slowing the heart rate and boosting Intestinal activity.