Respiration
1. This question has 3 part(s).
1.1. Figure 1 shows a single-celled pond organism (Amoeba proteus).
Figure 1
(i) Which row of the table allows the net diffusion of oxygen into Amoeba proteus?
(1)
concentration of oxygen in | concentration of oxygen in | ||
☐ | A | 4 | 4 |
☐ | B | 10 | 10 |
☐ | C | 4 | 10 |
☐ | D | 10 | 4 |
(ii) Amoeba proteus uses oxygen for aerobic respiration. Complete the equation for aerobic respiration.
(1)
glucose + oxygen → .............................. + ............................. (+ energy is released)
1.2. Humans breathe faster when they exercise.
(i) Which two changes allow the rate of respiration in the muscle to increase?
(1)
| heart rate | amount of glucose |
A | increases | increases |
B | increases | decreases |
C | decreases | increases |
D | decreases | decreases |
(ii) Figure 2 shows breathing data for a human at rest and when running at 5 metres per second on a running machine.
activity | mean number of breaths per minute | mean volume of air in one breath in dm3 | mean volume of air breathed in dm3 per minute |
|---|---|---|---|
at rest | 5.0 | 0.8 | 4.0 |
running at 5 metres per second | 24.7 | 2.7 | ? |
Figure 2
Calculate the mean volume of air breathed per minute when running at 5 metres per second.
Give your answer to one decimal place.
(2)
(iii) Devise an investigation to compare the mean number of breaths per minute for men, with the mean number of breaths per minute for women, when running at 5 metres per second on a running machine.
(4)
1.3. Whilst running, the leg muscles of an athlete tightened up, causing cramp.
Name the product of anaerobic respiration that can cause cramp.
Ai এর মাধ্যমে
১০ লক্ষ+ প্রশ্ন ডাটাবেজ
প্র্যাকটিস এর মাধ্যমে নিজেকে তৈরি করে ফেলো
উত্তর দিবে তোমার বই থেকে ও তোমার মত করে।
সারা দেশের শিক্ষার্থীদের মধ্যে নিজের অবস্থান যাচাই
No related questions found
