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Hamza najib

week 14

QuestionAnswer
What is the main function of the skeletal system? It supports the body, protects organs, and helps with movement when muscles pull on bones.
The basic structural unit of compact bone is called the ________. Osteon
What is an osteoblast? A bone-building cell that makes new bone tissue
What ion is needed to trigger muscle contraction? Calcium. It binds to troponin and exposes actin binding sites.
A muscle fiber contracts when the ________ shortens Sarcomere
What gland is known as the “master gland”? The pituitary gland because it controls other endocrine glands.
What is homeostasis? The body maintaining stable internal conditions like temperature and pH.
Which two systems work together to move oxygen and carbon dioxide in and out of the body? The respiratory and cardiovascular systems.
Gas exchange in the lungs happens in tiny sacs called ________. Alveoli
What is the main function of red blood cells? To carry oxygen to tissues and return carbon dioxide to the lungs.
Created by: user-1991226
 

 



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