Choose the appropriate letter below to make the statements true. (a) stimulates
ID: 3516569 • Letter: C
Question
Choose the appropriate letter below to make the statements true.
(a) stimulates or increase
(b) decreases or inhibits
(c) has no effect on
- Decreased cardiac output ___ the mean systemic arterial blood pressure.
- Decreased venous radius ___ the venous return.
- Increased arteriolar radius ___ the total peripheral resistace.
- Decreased O2, increased CO2, increased acid, and increased K+ concentrations in the skeletal muscle ___ the radius of the arterioles supplying this skeletal muscle.
- Increased total peripheral resistance ___ the mean systematic arterial blood pressure.
- Increased parasympathetic nerve activity ___ the heart rate.
- Decreased blood pressure ___ the rate of firing in afferent nerves arising from the baroreceptors.
-Increased venous return ____ the end-diastolic volume.
Explain reasoning for each
Explanation / Answer
-Decreased cardiac output decrease the mean systemic arterial blood pressure, because of less blood amounts.
-Decreased venous radius increase the venous return, because of less distribution of blood in periphery.
-Increased arteriolar radius increases the total peripheral resistance, because of more area of supply.
-Decreased O2, increased CO2, increased acid and increased K+ concentration in the skeletal muscle increase the radius of the Arterioles supplying this skeletal muscle, because of more need of blood to that particular muscle.
-Increased total peripheral resistance increases the main systematic arterial blood pressure because of more pressure exertion.
-Increased parasympathetic nerve activity decrease the heart rate, because of acetylcholine neurotransmitter and receptor.
-Decreased blood pressure increases the rate of firing in afferent nerves arising from the baroreceptors, because of reflex mechanisms.
-Increased venous return increases the end diastolic volume, because more blood coming to the heart.