Julia Sagasta

[Julia Sagasta @JSagastaCC]

Carbon dioxide is carried thru the blood in three forms:
1) carbonic acid
2) carbaminohemoglobin
3) as dissolved gas
#CCPhysio

[Julia Sagasta @JSagastaCC]

The pH of blood affects the affinity of hemoglobin for oxygen. As CO2 increases (pH decrease) the affinity of hemoglobin for oxygen decreases #BohrShift #CCPhysio

[Julia Sagasta @JSagastaCC]

Thanks to our nervous system for providing us the basic functions of sensation, communication, integration, and control over our body 👍🏼 #CCPhysio

[Julia Sagasta @JSagastaCC]

BP can be regulated by the cardiovascular system by nerve impulses (cardiac output and mean arterial pressure) AND the renal system (getting rid of excess water) #CCPhysio

[Julia Sagasta @JSagastaCC]

The sympathetic nervous system and it's physiological effects on the body in one picture: #CCPhysio #flightorflight

[Julia Sagasta @JSagastaCC]

The normal range of pH in the blood is 7.35 to 7.45. Venous blood is slightly more acidic than arterial blood! #CO2production #CCPhysio

[Julia Sagasta @JSagastaCC]

many factors add to the [H+] of the blood, like break down of proteins (meats), CO2 production, and fat catabolism. There are even sources of acid in the air we breath due to burning of fossil fuels! #CCPhysio

[Julia Sagasta @JSagastaCC]

Respiratory regulation of pH is a quick fix to bring it back to set point, renal regulation of pH is more powerful than respiratory compensation, but it takes longer (around a day to totally rid the body of excess H+ or HCO3-; depending on conditions) #CCPhysio

[Julia Sagasta @JSagastaCC]

Regulation of the pH in the body is done by respiratory physiology AND renal physiology #CCPhysio

[Julia Sagasta @JSagastaCC]

The bicarbonate/ CO2 system is the CENTRAL acid-base system of the body #CCPhysio

[Julia Sagasta @JSagastaCC]

Conduction of electrical impulse through the heart is SA node (atrial depolarization) --> AV node --> bundle of His --> purkinji fibers (ventrical depolarization) #CardioReview #CCPhysio

[Julia Sagasta @JSagastaCC]

MAP: mean arterial pressure; determined by blood volume, cardiac output, total peripheral resistance, and diameter of veins. Different systems can come to play to impact these parameters like renal physiology and nervous system and more! #Integration #CCPhysio

[Julia Sagasta @JSagastaCC]

Increased demand for O2 by the body and nutrients is accommodated by an increase in cardiac output. Increasing cardiac output can be done by increasing stroke volume OR heart rate #CCPhysio

[Julia Sagasta @JSagastaCC]

Thanks to the cardiovascular system for the movement of substances entering the body, substances from one cell to another, and substances out of the body 👍🏼 without you we would have a lot of trouble trying to maintain homeostasis! #CCPhysio

[Julia Sagasta @JSagastaCC]

Can't forget about osmosis/ diffusion in physiology! It is important in EVERY system. Renal, Respiratory, Neuro, and Cardio to name a few all function based on some type of concentration gradient #CCPhysio

[Julia Sagasta @JSagastaCC]

Physiology review means distinguishing which hormones (lipid soluble/ insoluble) have receptors where. Lipid soluble receptors are located.... #CCPhysio

[Julia Sagasta @JSagastaCC]

When someone experiences fear surprise and/ or stress: the hypothalamus sends a signal to activate the sympathetic branch of the autonomic NS. Nerve impulses are sent to the adrenal glands which increase secretion of epinephrine! #CCPhysio 😬😳😮

[Julia Sagasta @JSagastaCC]

Sources of ATP available for skeletal muscle contraction include cytosolic ATP, creatine phosphate, aerobic respiration, and anerobic respiration! #CCPhysio

[Julia Sagasta @JSagastaCC]

Type 1 muscle fibers specialize in long duration contraction and are found in abundance in elite endurance athletes while elite power athletes exhibit abundance of fibers 2a&b. So I think I can conclude this is the reason I am a pure distance swimmer! #CantSprint #CCPhysio

[Julia Sagasta @JSagastaCC]

One motor neuron innervates a # of muscle fibers, but each muscle fiber in a vertebrate is supplied by only ONE motor neuron 👍🏼 #CCPhysio