Relating Evidence to Ideas: Scientific Communication Task 3 Assessment Answer
Hypothesis: the cycling at environmental temperatures over 15°C heart rate will be higher than when cycling at lower temperatures.
The normal human body temperature is considered to be approximately 37.0 C for the core body and skin temperatures can sometimes be as low as 33.5 C (Houdas & Ring, 2013). When cycling at lower temperatures, the body would have to attain additional temperature to attain the normal body temperature. The human body has a constant heat generation form the organs due to metabolism. Moreover, the body has an internal thermostat mechanism that ensures that the heat remains between 37.0 and 37.2C through the control of the hypothalamus gland (Dobbs, 2009). The rise in the ambient temperature (above 28.8 C) would lead to the glad to regulate heat through sweating that would leave a cooling effect on the skin surface (Houdas & Ring, 2013). When exercising the organs tends to have increased rate of metabolism hence the more heat generation. At rets the optimal working body conditions are attained.
The skin plays a huge role as part of the integumentary system to help protect the skin from damages as well as loss of heat. First, the skin can control the dilation or the constriction of the numerous blood vessel that will either lead to heat loss or heat gain respectively (Houdas & Ring, 2013). This is done for exercise through a process known as flushing (Master, 2003). Secondly, the skin has pores that would be responsible for the loss of water through swat glands and thus bringing a surface cooling effect to the skin (Master, 2003).
The nervous impulse would be felt through stimuli at the effectors, that are located on the skin. The resulting stimulation transmission through the sensory neuron onto the Central nervous system. The resulting action is relayed back through the motor neuron to the intended effector like muscles (Masao , 1984).
As part of the thermoregulation process the skin works together with other body organs like the heart that would distribution the heat through the blood system. At elevated temperatures of about 31 C for the ambient, the skin surface is warmer than usual. Moreover, vigorous exercises would lead to increased heat generation from the body organs. Also, the dilation of the blood vessels would lead to an increased dimeter for the blood vessels. The hypothalamus would trigger the heat to increase the blood distribution in an attempt to dissipate the heat from the organs of generation. The result is an increased heart rate (Houdas & Ring, 2013; Dobbs, 2009).