Give reasons:
a)we get muscle cramps after heavy exercise.
b)Gills are well supplied with blood vessels in fishes.
c)we sneeze after inhaling dust laden air.
(3marks)
please help me
this is urgent
write the answer on 3 marks
Answers
Answer:
Hey mate, here's your answer .....
Explanation:
a) The cramps occur when muscle cells repire anaerobically. The partial breakdown of glucose produces lactic acid. The accumulation of lactic acid causes muscle cramps.
b) Oxygen and carbon dioxide dissolve in water, and most fishes exchange dissolved oxygen and carbon dioxide in water by means of the gills. The blood capillaries in the gill filaments are close to the gill surface to take up oxygen from the water and to give up excess carbon dioxide to the water.
c) We sneeze after inhaling dust laden air because by sneezing, our body tries to expel the dust particles from the air we inhaled so that only clean air enters our body.
Hope this answer helps you....
PLEASE MARK ME AS BRAINLIEST
Answer:
Here are your answers buddy!!
a) The cramps occur when muscle cells respire anaerobically. The partial breakdown of glucose produces lactic acid. The accumulation of lactic acid causes muscle cramps.
b) Oxygen and Carbon Dioxide dissolve in water, and most fishes exchange dissolved Oxygen and Carbon Dioxide in water by means of the gills The blood capillaries in the gill filaments are close to the gill surface to take up oxygen from the water and to give up excess carbon dioxide to the water.
c) We often sneeze when we inhale a lot of dust-laden air to expel out these foreign particles. These particles get past the hair in the nasal cavity and irritate the lining of the cavity which triggers a message to the brain. The brain instructs the nasal chamber to initiate sneezing. This is a method to remove the unwanted dust particles from the nostrils. The sneezing is a type of defence mechanism used by our body.
Hope this helps you!!
Please mark it a s brainliest!!