Q: Which equation best represents the effect of the Na\textsuperscript{+}/K\textsuperscript{+} pump on membrane potential?

$$3\ \mathrm{Na}^{+}\ \text{out} : 2\ \mathrm{K}^{+}\ \text{in}$$

Q: Which of the following best describes the process of repolarization during an action potential?

Voltage-gated K\textsuperscript{+} channels open, causing K\textsuperscript{+} to exit the cell and membrane potential to become more negative.

Question 1

Which hormone is released by the anterior pituitary gland and stimulates the thyroid to produce T3 and T4?

Accepted Answer

TSH (Thyroid-Stimulating Hormone)

Question 2

A patient presents with chronic stress and elevated blood glucose. Which hormone is most likely responsible for these symptoms, and where is it produced?

Accepted Answer

Cortisol; Adrenal Cortex

Question 3

Which of the following best describes the mechanism by which steroid hormones exert their effects?

Accepted Answer

They bind to intracellular receptors and directly alter gene expression.

Question 4

Which pathway correctly describes the HPA axis involved in the stress response?

Accepted Answer

Hypothalamus → CRH → Anterior Pituitary → ACTH → Adrenal Cortex → Cortisol

Question 5

A patient with diabetes insipidus is unable to retain water in the kidneys. Which hormone is deficient?

Accepted Answer

ADH (Antidiuretic Hormone)

Question 6

Which of the following is NOT a function of cortisol?

Accepted Answer

Stimulates muscle contraction

Question 7

Which hormone is secreted by the pineal gland and regulates circadian rhythms?

Accepted Answer

Melatonin

Question 8

Which of the following cell types is responsible for forming the blood-brain barrier?

Accepted Answer

Astrocytes

Question 9

During an action potential, which phase is characterized by the opening of voltage-gated Na	extsuperscript{+} channels and a rapid increase in membrane potential?

Accepted Answer

Depolarization

Question 10

Which equation best represents the effect of the Na	extsuperscript{+}/K	extsuperscript{+} pump on membrane potential?

Accepted Answer

$$3\ \mathrm{Na}^{+}\ 	ext{out} : 2\ \mathrm{K}^{+}\ 	ext{in}$$

Question 11

Which hormone is produced by pancreatic $$ \beta -$$cells and lowers blood glucose levels?

Accepted Answer

Insulin

Question 12

A patient is unable to contract skeletal muscles due to a neurotransmitter deficiency at the neuromuscular junction. Which neurotransmitter is most likely deficient?

Accepted Answer

Acetylcholine

Question 13

Which of the following is TRUE regarding peptide hormones?

Accepted Answer

They bind to cell surface receptors and are water-soluble.

Question 14

Which brain region is primarily responsible for regulating body temperature, hunger, and circadian rhythms?

Accepted Answer

Hypothalamus

Question 15

Which of the following best describes the role of the autonomic ganglion in the nervous system?

Accepted Answer

It is the relay point where pre- and postganglionic neurons synapse.

Question 16

Which hormone is released by the posterior pituitary and is involved in water retention in the kidneys?

Accepted Answer

ADH (Antidiuretic Hormone)

Question 17

Which of the following statements about thyroid hormones is CORRECT?

Accepted Answer

They are stimulated by TSH from the anterior pituitary.

Question 18

A patient with excess FSH and LH is likely to have which condition?

Accepted Answer

Hypergonadotropism

Question 19

Which of the following is a function of the sarcoplasmic reticulum in muscle cells?

Accepted Answer

Stores calcium for muscle contraction

Question 20

Which of the following best describes the process of repolarization during an action potential?

Accepted Answer

Voltage-gated K	extsuperscript{+} channels open, causing K	extsuperscript{+} to exit the cell and membrane potential to become more negative.

Endocrine and Nervous Systems: Structure, Function, and Key Concepts

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