When you go outside on a hot summer day, your body temperature heats up above the normal range. Receptors in your brain detect the change in body temperature. The brain activates nerve cells that send messages to sweat glands, causing the body
temperature to fall as the sweat evaporates from the skin. What part of this feedback loop is the effector?
A) increased body temperature B) sweat glands
C) brain D) nerve cells
Answer: B
You might also like to view...
This figure shows the scapula. Which number indicates the acromion?
A. 1 B. 3 C. 4 D. 5 E. 7
White blood cells
a. are the most abundant type of blood cell b. do not have nuclei c. are actually only cell fragments d. defend the body against foreign invasion e. are found only in the blood
The process of respiration that moves air into and out of the lungs is:
A) gas transport. B) tissue gas exchange. C) pulmonary ventilation. D) pulmonary gas exchange.
The lead arrangement known as Einthoven's triangle, which is used to record an ECG, involves placing recording electrodes on
A. both wrists and the left ankle. B. the left and right shoulders and the navel. C. both wrists and the right ankle. D. both ankles and the right wrist. E. both ankles and the left wrist.