What are the bone cells called that produce the organic matrix?
a. exocytes
b. chondrocytes
c. osteoblasts
d. endocytes
e. osteoclasts
c
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When dogs mate, the swelling near the base of the dog's penis enlarges and temporarily binds the stud to the bitch during copulation and is called a/an________________
Fill in the blank(s) with correct word
Blood vessels, nerves and a main bronchus all enter each lung at the hilum.
Answer the following statement true (T) or false (F)
The parathyroid glands maintain adequate levels of blood calcium. This is accomplished through ________.
A) blocking the action of growth hormone B) targeting the bone and activating osteoclasts so that calcium will be released C) antagonizing the synthesis of calcitonin D) slowing the activity of tissues that require calcium for activity
Which of the following are considered an "essential" nutrient?
a. All amino acids b. glucose molecules c. fatty acids d. certain vitamins e. hormones