Nokea
A hormone that is significantly involved in regulation of blood volume is:
- A. ACTH
- B. osmoretic hormone
- C. ADH
- D. LH
Correct Answer: C
Rationale: Antidiuretic hormone (ADH) regulates blood volume by promoting water reabsorption in the kidneys, increasing plasma volume. ACTH affects cortisol, and LH is reproductive; 'osmoretic hormone' is not a standard term.
You may also like to solve these questions
Which structure in the heart initiates action potentials that stimulate contraction of the heart at constant rate of about 100 beats per minute?
- A. Cardiac accelerator nerves
- B. Atrioventricular node
- C. Cardiovascular center
- D. Sinoatrial node
Correct Answer: D
Rationale: The SA node (D) initiates action potentials at ~100 bpm, though vagal tone slows it to 60-80 bpm in vivo. AV node (B) is slower (~40-60 bpm), nerves (A) and center (C) modulate.
Which type of white blood cell plays a major role in immunity?
- A. Monocytes
- B. Eosinophils
- C. Lymphocytes
- D. Basophils
Correct Answer: C
Rationale: Lymphocytes (C) (T/B cells) are central to adaptive immunity.
The contraction of the heart muscle is called
- A. diastole
- B. peristalsis
- C. systole
- D. spasm
Correct Answer: C
Rationale: Systole (C) is heart muscle contraction (atrial or ventricular). Diastole (A) is relaxation, peristalsis (B) is GI movement, and spasm (D) is involuntary contraction.
A client in the primary care clinic has poor peripheral perfusion due to peripheral tissue perfusion. Which of the following would be a modifiable risk factor in the prevention of decreased tissue perfusion? Select all that apply.
- A. Elevated serum lipids
- B. Gender
- C. Hypertension
- D. Age
Correct Answer: C
Rationale: hypertension are modifiable via lifestyle or medication, improving perfusion. Gender (B) and age (D) are non-modifiable. (Source: Document, p. 12-13; adapted, multi-select noted)
The accumulation of soft masses of fatty materials, particularly cholesterol, on the inside of the arterial wall is known as:
- A. ischemia
- B. atherosclerosis
- C. arteriosclerosis
- D. phlebitis
Correct Answer: B
Rationale: Atherosclerosis is the buildup of fatty plaques (e.g., cholesterol) in the arterial tunica intima, a subset of arteriosclerosis (general hardening). Ischemia is reduced blood flow, and phlebitis is vein inflammation.