The "gray matter of the brain is largely made up of which of the following?
A. Neuron cell bodies
B. Meninges
C. Neuron cell axons
D. Corpus callosum
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The gray matter of the brain primarily consists of neuron cell bodies, along with dendrites, glial cells, and unmyelinated axons. It appears gray because it lacks the white fatty myelin sheath that covers many nerve fibers.
Therefore, the Correct Answer is A.
More Questions on TEAS 7 Science Exam 5
Question 1:
Which of the following organelles is the site of intracellular digestion?
A. Mitochondria
B. Lysosomes
C. Centrosomes
D. Ribosomes
The Correct Answer is B.Lysosomes are membrane-bound organelles that contain lysozymes that are responsible for breaking down waste materials and cellular debris through intracellular digestion. This process helps maintain cellular health and homeostasis by recycling and degrading cellular components.
Question 2:
Experiments cannot validate hypotheses, only falsify them
The statement above can be restated in which of the following ways?
A. Until disproved, an exploration for an observation is valid
B. A hypothesis that has not been falsified remains provisional
C. Certain concepts cannot be subjected to direct experimentation
D. Proving a hypothesis exempt from further testing
The Correct Answer is B.This means that a hypothesis is considered valid until it is disproved by experimental evidence. However, even if a hypothesis has not been falsified, it is still considered provisional and subject to further testing and scrutiny.
Question 3:
Which of the following nucleotides is only found in RNA?
A. Guanine
B. Thymine
C. Uracil
D. Adenine
The Correct Answer is C.Uracil is the nucleotide that is only found in RNA. The other nucleotides are found in both DNA and RNA
Question 4:
Which of the following demonstrates a chemical reaction of water?
A. Water boils to produce steam at 100° C (252)
B. Water Dissolves sugar
C. Water produces gas with sodium metal
D. Water and all separate when combined
The Correct Answer is C.a. Water boils to produce steam at 100°C - This is a phase change (from liquid to gas) and not a chemical reaction of water.
b. Water dissolves sugar - This is a physical change, not a chemical reaction of water.
c. Water produces gas with sodium metal - This reaction involves the chemical reaction of water with sodium metal to produce hydrogen gas.
d. Water and oil separate when combined - This is a physical separation, not a chemical reaction of water.
Question 5:
Escherichia cell is plated on nutrient agar plates that each contain a different type of antibiotic. The shaded area represents growth of the bacteria. Which of the following plates contains bacteria that were most resistant to the antibiotic
A. A
B. B
C. C
D. D
The Correct Answer is C.This is the plate with the most growth despite the presence of antibiotic cover.
Question 6:
Which of the following respiratory structures is affected by a disease that disrupts gas exchange, such as emphysema?
A. Trachea
B. Secondary branch
C. Primary bronchi
D. Alveoli
The Correct Answer is D.Question 7:
Which of the following would result in an increase in the chemical reaction?
A. Adding more of the product
B. Decreasing the concentration of the reactant
C. Sealing the reaction in an airtight container
D. Using a mortar and pestle to grind a solid reactant to a powder
The Correct Answer is D.Crushing a solid reactant into powder increases the surface area of the reactant, thereby increasing chemical reaction. This is because more of the reacting molecules or ions are exposed to the other reactant, which increases the chance of particles colliding and leads to more successful collisions per second.
Question 8:
Which of the following structures drains oxygen-depleted blood from the kidneys?
A. Renal artery
B. Urethra
C. Ureter
D. Renal Vein
The Correct Answer is D.The renal vein drains deoxygenated blood from the kidneys to the inferior vena cava.
Question 9:
in pea plants, green pod color (6) is dominant to yellow pod color ( A cross was done between a plant with green pods and a plant with yellow pods. Of the resulting offspring 50% had green pods and 50% had yellow pods. Which of the following were the genotypes of both parent plants?
A. Ggx Gg
B. GG x gg
C. Gg x gg
D. gg x gg
The Correct Answer is C.
|
|
G |
g |
|
g |
Gg |
gg |
|
g |
Gg |
gg |
Question 10:
Which of the following types of cells stimulates other immune cells to attack and destroy foreign agents?
A. Cytotoxic T-cells
B. Plasma cells
C. Natural killer cells
D. Helper T-Cells
The Correct Answer is D.Helper T cells are important cells that stimulate the action of other immune cells. For instance, they not only help activate B cells to secrete antibodies and macrophages to destroy ingested microbes, but they also help activate cytotoxic T cells to kill infected target cells.