Hormones are intercellular chemical signals that
A. are secreted into the external environment where they act.
B. affect only non-hormone producing organs or tissues.
C. help coordinate growth, development and reproduction.
D. operate primarily by positive feedback.
C
You might also like to view...
As part of a bird's gastrointestinal system, the cloaca is defined as the:
A) elongated, spindle-shaped, glandular stomach B) common passage for the fecal, urinary, and reproductive systems C) esophageal enlargement that stores, moistens, and softens food D) structure at the terminal end of the jejunum
Which factor below does not slow down gastric activities?
a. enterogastric reflex b. enterogastrones c. secretin d. gastrin e. cholecystokinin
Which of the following circumstances might cause small airways to collapse?
a. during normal quiet breathing b. during maximal forced expiration c. during pneumothorax d. both (b) and (c) above. e. all of these answers.
The three meninges are the dura mater, arachnoid, and pia mater.?
Indicate whether the statement is true or false