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

Answer Explanation:

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.

Q #1: Which of the following organelles is the site of intracellular digestion?

A. Mitochondria

B. Lysosomes

C. Centrosomes

D. Ribosomes

Answer Explanation

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.
Q #2: Which of the following hormones regulates blood calcium levels?

A. Parathyroid hormone

B. Growth hormone

C. Norepinephrine

D. Melatonin

Answer Explanation

The parathyroid hormone (PTH) from the parathyroid glands is important in serum calcium regulation. It increases blood calcium levels by stimulating osteoclasts to break down bone and release calcium into the bloodstream. PTH also enhances the absorption of calcium from the intestines and the kidneys.
Q #3: Which of the following processes causes most of the carbon dioxide from the blood to move into the alveoli?

A. Passive transport using carrier proteins

B. Conversion to carbon monoxide

C. Active transport using energy

D. Diffusion down a concentration gradient

Answer Explanation

Most of the carbon dioxide from the blood moves into the alveoli through the process of diffusion down a concentration gradient. In the lungs, there is a higher concentration of carbon dioxide in the blood compared to the alveoli. Its molecules, therefore, move from an area of higher concentration (blood) to an area of lower concentration (alveoli) until equilibrium is reached. This is a passive process and does not require energy or carrier proteins.

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The "gray matter of the brain is largely made up of which of the following?

More Questions on TEAS 7 Science

Q #1: Which of the following organelles is the site of intracellular digestion?

Answer Explanation

Q #2: Which of the following hormones regulates blood calcium levels?

Answer Explanation

Q #3: Which of the following processes causes most of the carbon dioxide from the blood to move into the alveoli?

Answer Explanation

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The &quot;gray matter of the brain is largely made up of which of the following?

More Questions on TEAS 7 Science

Q #1: Which of the following organelles is the site of intracellular digestion?

Answer Explanation

Q #2: Which of the following hormones regulates blood calcium levels?

Answer Explanation

Q #3: Which of the following processes causes most of the carbon dioxide from the blood to move into the alveoli?

Answer Explanation

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The "gray matter of the brain is largely made up of which of the following?