Which of the following statements regarding the health effects of exercise is fa
ID: 282290 • Letter: W
Question
Which of the following statements regarding the health effects of exercise is false? a. the risk of death from breast cancer is greater in low aerobic fitness groups b. there is some evidence that aerobic exercise can increase brain volume in the elderly c. low aerobic fitness is associated with a greater risk of colon cancer d. none of the above statements are false Which of the following statements is true? a. arteries always carry oxygenated blood b. the right ventricle pumps blood into the systemic (whole body) circulation c. at rest, most of the blood is found in the veins and venules d. none of the above statements are true Which of the following statements regarding neurotransmitters is false? a. Parkinson's disease is associated with an impaired dopamine network b. cholinesterase inhibitors are used to treat Alzheimer's symptoms c. cocaine and amphetamines both increase dopamine concentrations d. none of the above are false The blood brain barrier allows only certain compounds to pass from the circulation through to the brain. Which of the following statements is false? a. astrocytes release a paracrine factor which promotes the formation of tight junctions of the blood brain barrier substances such as caffeine and alcohol can cross the blood brain barrier b. c. glucose crosses the blood brain barrier via the insulin-sensitive transporter, GLUT4 d. none of the above are false Which of the following statements correctly describes GABA (gamma-amino butyric acid)? a. GABA is released at the presynaptic terminal to inhibit dopamine release b. GABA is released by GABA neurons and blocks propagation of the dopamine-triggered signal in the post synaptic nerve c heroin and morphine inhibit GABA release, thereby increasing dopamine signaling d. two of the above are correctExplanation / Answer
ANSWER 10. 1. d. None of these is false
Reason - Because excercise maintains an aerobic environment inside the body which improves brain volume and cognition. Thus also helpful in reducing the risk of cancer because the cancerous cells need an acidic environment to susrvive.
ANSWER 10. 2. a. Arteries always carry oxygenated blood
Reason - This is because the arteries always carry oxygenated blood whereas the veins carry the deoxygenated blood.
ANSWER 10. 3. d. None of them are false
ANSWER 10. 4. c. Glucose crosses blood brain barrier via insulin sensitive transporter Glut4
Reason - This is because glucose is selectively transported through blood brain barrier via Glut1 and Glut3. Not Glut4 since Glut4 is present in the skeletal muscles and the fat cells not in the brain.
ANSWER 10. 5.a. GABA is released at the presynaptic terminal to inhibit dopamine release.
Reason - Because GABA does this by the activation of G-protein coupled receptors that ultimately inhibit dopamine release.
Related Questions
drjack9650@gmail.com
Navigate
Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.