Which type of tissue lines body cavities and covers body surfaces?  

A homeostatic system generally has three components: a receptor, an effector, and a control center.  In the example given below, determine which is acting as the effector: When a person has not taken in sufficient water, they become dehydrated.  This may cause a loss of blood pressure which is detected by structures known as baroreceptors in the blood vessels.  The baroreceptors communicate with the brain, telling it to release a chemical known as antidiuretic hormone.  This hormone signals the kidney to decrease the amount of urine produced so that more water stays in the blood, helping to bring the blood pressure back up to normal levels.  

Which type of ossification is described here: Begins during fetal development Doesn’t involve growth plates Osteoblasts form new bone Forms primarily flat bones  

If you get enough calcium in your diet, blood levels of parathyroid hormone should be ______________ and blood levels of calcitonin should be ______________.  

A serous membrane is an organ.  

Critical Thinking You’ve discovered a new animal in the Amazon jungle.  That animal must keep its body pH between 6.95 – 7.05 to remain alive.  You’ve captured one of these animals and measured its pH at  6.95.  Based on the above, answer these questions: 1. Which type of feedback (positive or negative) would prevent the animal’s pH from becoming any lower?  Explain why you made the choice you did. 2. Suppose the animal’s pH were 7.05.  Which type of feedback would prevent it from becoming any higher?  Explain why you made the choice you did.  

A connective tissue with a high density of fibers and very little ground substance:  

Which epithelial tissue would be best at protecting underlying tissues?  

The action potential of cardiac muscle is initiated at:A) AV nodeB) SA node ✅C) Bundle of HisD) Purkinje fibers  

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