× Didn't find what you were looking for? Ask a question
Top Posters
Since Sunday
a
5
k
5
c
5
B
5
l
5
C
4
s
4
a
4
t
4
i
4
r
4
r
4
Home Q & A Board Biology-Related Homework Help Medicine Emergency Medical Care
New Topic  
tpost99 tpost99
wrote...
Posts: 508
Rep: 0 0
6 years ago
In what order do the heart chambers contract when the heart beats?
 
  A) Ventricles then atria B) Left side then right side
  C) Atria then ventricles D) Right side then left side

Question 2

The ascending nephron loop is permeable to
 
  A) water.
   B) ions.
   C) proteins.
   D) sugar.

Question 3

______________________ is primarily responsible for maintaining the balance of water in the body and is regulated by the kidney.
 
  a. Calcium
  b. Phosphorus
  c. Sodium
  d. Potassium
Read 42 times
1 Reply

Related Topics

Replies
wrote...
#1
6 years ago
Answer to q. 1

C

Answer to q. 2

B

Answer to q. 3

c
Rationale: a. Calcium is found mainly in bone tissue and is responsible for structure of bone and teeth as well as other functions.
b. Phosphorus is an anion and does not regulate water.
c. Correct.
d. Potassium is necessary for the transmission and conduction of nerve impulses, maintenance of normal cardiac rhythms, and skeletal muscle contraction.
New Topic      
Quick Reply
Explore
Post your homework questions and get free online help from our incredible volunteers
  1322 People Browsing
 109 Signed Up Today
Start New Topic Take the Tour CoursesNew Study Tools Topics Trending Browse by Textbook
Live Chat
Related Images
  
 1137
  
 2762
  
 380
Your Opinion
What's your favorite funny biology word?
Votes: 328
Previous poll results: Should Ph.D.'s be addressed as doctors?